I've never read an autobiographical manga, yet i haven't heard of one besides Keimusho no Naka. And it's something else. By the time i read it for the first time as a teenager, i was astonished by it. Although japanese low security prisons really sound great, people tend to forget how this is centered around someone paying for his crimes and suffering the consequences. It really blow your mind to see this in a manga, and better, by the perspective of the one who actually did it. The art is great and makes you immerse into how Kazuichi is feeling there. There's also a handful ofeveryday situations that you can relate, all of them contribute for an outstanding experience.